Dual board patch array antenna

Abstract

The present invention provides a dual board patch array antenna, comprising: a radio board; a first-layer antenna board and a second-layer antenna board; the ground plane of the radio board is in contact with the first radiation ground plane of the first-layer antenna board through a patch-type conductive pad to form an extended ground area of ground connection; the probes of the radio board pass through and contact the patch microwave transmission line of the first-layer antenna board to form an electrical connection; wherein the patch microwave transmission line is assigned to the antenna radiating element of the second-layer antenna board as a vertically polarized antenna and a horizontally polarized antenna; the antenna radiating element contacts the first radiation surface on the first-layer antenna board through the conductor pad on the first layer antenna board, so as to expand the radiation surface area of the dual board patch array antenna.

The invention claimed is: 
     
         1 . A dual board patch array antenna, comprising:
 a radio board including a ground plane, a plurality of feed sources, a plurality of probes and a plurality of patch-type conductive pads, the ground plane being provided on a side of the radio board, the feed sources being provided on another side of the radio board, the probes being provided on the ground plane and passing through the ground plane and the radio board, and being electrically connected to the feed sources, and the patch-type conductive pads being provided adjacent to locations of the probes;   a first-layer antenna board including a first radiation ground plane, a first radiation surface and a plurality of conductor pads, the first-layer antenna board being provided on the radio board, the first radiation ground plane being provided on a side of the first-layer antenna board, the first radiation surface being provided on another side of the first-layer antenna board, the first radiation surface including a plurality of groups of patch microwave transmission lines, and the conductor pads being provided on the first radiation surface; and   a second-layer antenna board including a second radiation surface, the second-layer antenna board being provided on the first-layer antenna board, the second radiation surface being provided on a side of the second-layer antenna board, and the second radiation surface including a plurality of antenna radiating elements,   wherein the ground plane forms an extended ground area by forming a ground connection by contacting the patch-type conductive pads with the first radiation ground plane, and the probes pass through the first radiation ground plane and the first-layer the antenna board and contact the patch microwave transmission lines to form an electrical connection, and   wherein the patch microwave transmission lines are assigned to the antenna radiating elements to serve as a vertically polarized antenna and a horizontally polarized antenna, and the antenna radiating elements contact the first radiation surface through the conductor pads to expand a radiation surface area of the dual board patch array antenna.   
     
     
         2 . The dual board patch array antenna according to  claim 1 , wherein the patch microwave transmission lines include a series-connected microwave transmission line feed source and a parallel-connected microwave transmission line feed source, the series-connected microwave transmission line feed source corresponds to the horizontally polarized antenna, and the parallel-connected microwave transmission line feed source corresponds to the vertically polarized antenna. 
     
     
         3 . The dual board patch array antenna according to  claim 1 , wherein the first-layer antenna board further includes a plurality of solder resist layers, the solder resist layers are provided on the first radiation surface, and each of the solder resist layers is correspondingly provided around each of the conductor pads. 
     
     
         4 . The dual board patch array antenna according to  claim 3 , wherein the conductor pads are provided on the first radiation surface through surface mount technology. 
     
     
         5 . The dual board patch array antenna according to  claim 1 , further comprising a plurality of plastic screws, a plurality of inner plastic through columns and a plurality of plastic nuts,
 wherein the inner plastic through columns are provided between the first-layer antenna board and the second-layer antenna board, the plastic nuts are provided on another side of the second-layer antenna board, the plastic screws are disposed on the side of the first-layer antenna board, and the plastic screws pass through the first-layer antenna board, the inner plastic through columns, and the second-layer antenna board, and are locked with the plastic nuts, so as to fix the second-layer antenna board onto the first-layer antenna board.   
     
     
         6 . The dual board patch array antenna according to  claim 5 , further comprising a plurality of screws, a plurality of outer plastic through columns, a plurality of first nuts, a plurality of washers and a plurality of second nuts,
 wherein the outer plastic through columns are provided at four corners between the first-layer antenna board and the second-layer antenna board, the first nuts are provided between the first-layer antenna board and the radio board, the washers and the second nuts are provided on the other side of the radio board, the screws are provided on the other side of the second-layer antenna board, and the screws pass through the second-layer antenna board, the outer plastic through columns, the first-layer antenna board, the first nuts, the radio board, and the washers, and are locked with the second nuts, so as to fix together the second-layer antenna board, the first-layer antenna board, and the radio board.   
     
     
         7 . The dual board patch array antenna according to  claim 6 , wherein the heights of the inner plastic through columns and the outer plastic through columns are identical to the heights of the conductor pads. 
     
     
         8 . The dual board patch array antenna according to  claim 1 , further comprising a signal switching pin and a radio frequency connection terminal,
 wherein the signal switching pin and the radio frequency connection terminal are provided on the other side of the radio board and adjacent to one of the feed sources, a first terminal of the signal switching pin is electrically connected to one of the feed sources, a second terminal of the signal switching pin is electrically connected to one of the probes, and a third terminal of the signal switching pin is electrically connected to the radio frequency connection terminal.   
     
     
         9 . The dual board patch array antenna according to  claim 8 , further comprising an external dipole antenna,
 wherein the external dipole antenna is disposed on the other side of the radio board adjacent to one of the feed sources, and the external dipole antenna is electrically connected to the radio frequency connection terminal.   
     
     
         10 . The dual board patch array antenna according to  claim 1 , wherein the isolation between the horizontally polarized antenna and the vertically polarized antenna is more than −30 dB in the frequency range of 4.5 GHZ to 6.4 GHZ, and the isolation in the frequency range of 5.15 GHz to 5.85 GHz is more than −40 dB.